Daily Sunspot Evaluation
Observation Sheet Wednesday, 1 May 1991
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 7
- Number of spots (f)
- 49
- Relative number (R)
- 119
- Observer
- MB
- Reading
- all checks consistent
- File
- 19910501.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BRO – 3 | 9 | 03E | 41 | 03E | 2 | 193 |
| 2 | CAI – 15 | 7 | 11E | 33 | 11E | 7.5 | 136 |
| 3 | CAO – 7 | -28 | 44W | 88 | 44W | 8 | 200 |
| 4 | BRO – 3 | -41 | 22W | 66 | 22W | 6 | 194 |
| 5 | HS – 1 | -21 | 19E | 25 | 19E | 2 | 198 |
| 6 | CAO – 5 | -6 | 30E | 14 | 30E | 6.5 | 202 |
| 7 | CAI – 15 | -13 | 58E | 346 | 58E | 12 | 203 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.